Iraqi troops and Shia militias have battled against Islamic State (IS) south of the militant-held city of Tikrit, though roadside bombs and suicide attacks slowed their advance on Saddam Hussein's hometown.

Thousands of mourners and dignitaries have filed past the white-lined coffin of murdered Kremlin critic Boris Nemtsov, many offering flowers as they paid their last respects to one of the most prominent figures of Russia's beleaguered opposition.

A UN-backed war crimes tribunal in Cambodia has charged two former cadres of the 1970s Khmer Rouge regime with crimes against humanity over their alleged roles in the deaths of an estimated 1.8 million people.

One of the men convicted of raping and killing a woman in a brutal gang attack on a New Delhi bus in 2012 has said in a TV documentary that if the victim had not fought back she would not have been killed.

US Secretary of State John Kerry has met with his Russian counterpart in what appeared to be less than amicable talks amid continuing tensions over Ukraine and American calls for a full probe into the murder of a prominent opposition figure in Moscow.